DoubleTapGestureRecognizer class
Recognizes when the user has tapped the screen at the same location twice in quick succession.
DoubleTapGestureRecognizer competes on pointer events when it has a non-null callback. If it has no callbacks, it is a no-op.
- Inheritance
-
- Object
- GestureArenaMember
- GestureRecognizer
- DoubleTapGestureRecognizer
Constructors
-
DoubleTapGestureRecognizer({Object? debugOwner, Set<
PointerDeviceKind> ? supportedDevices, AllowedButtonsFilter allowedButtonsFilter = _defaultButtonAcceptBehavior}) - Create a gesture recognizer for double taps.
Properties
- allowedButtonsFilter → AllowedButtonsFilter
-
Called when interaction starts. This limits the dragging behavior
for custom clicks (such as scroll click). Its parameter comes
from PointerEvent.buttons.
finalinherited
- debugDescription → String
-
Returns a very short pretty description of the gesture that the
recognizer looks for, like 'tap' or 'horizontal drag'.
no setteroverride
- debugOwner → Object?
-
The recognizer's owner.
finalinherited
- gestureSettings ↔ DeviceGestureSettings?
-
Optional device specific configuration for device gestures that will
take precedence over framework defaults.
getter/setter pairinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- onDoubleTap ↔ GestureDoubleTapCallback?
-
Called when the user has tapped the screen with a primary button at the
same location twice in quick succession.
getter/setter pair
- onDoubleTapCancel ↔ GestureTapCancelCallback?
-
A pointer that previously triggered onDoubleTapDown will not end up
causing a double tap.
getter/setter pair
- onDoubleTapDown ↔ GestureTapDownCallback?
-
A pointer has contacted the screen with a primary button at the same
location twice in quick succession, which might be the start of a double
tap.
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
supportedDevices
↔ Set<
PointerDeviceKind> ? -
The kind of devices that are allowed to be recognized as provided by
supportedDevicesin the constructor, or the currently deprecatedkind. These cannot both be set. If both are null, events from all device kinds will be tracked and recognized.getter/setter pairinherited
Methods
-
acceptGesture(
int pointer) → void -
Called when this member wins the arena for the given pointer id.
override
-
addAllowedPointer(
PointerDownEvent event) → void -
Registers a new pointer that's been checked to be allowed by this gesture
recognizer.
override
-
addAllowedPointerPanZoom(
PointerPanZoomStartEvent event) → void -
Registers a new pointer pan/zoom that's been checked to be allowed by this
gesture recognizer.
inherited
-
addPointer(
PointerDownEvent event) → void -
Registers a new pointer that might be relevant to this gesture
detector.
inherited
-
addPointerPanZoom(
PointerPanZoomStartEvent event) → void -
Registers a new pointer pan/zoom that might be relevant to this gesture
detector.
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
dispose(
) → void -
Releases any resources used by the object.
override
-
getKindForPointer(
int pointer) → PointerDeviceKind -
For a given pointer ID, returns the device kind associated with it.
inherited
-
handleNonAllowedPointer(
PointerDownEvent event) → void -
Handles a pointer being added that's not allowed by this recognizer.
inherited
-
handleNonAllowedPointerPanZoom(
PointerPanZoomStartEvent event) → void -
Handles a pointer pan/zoom being added that's not allowed by this recognizer.
inherited
-
invokeCallback<
T> (String name, RecognizerCallback< T> callback, {String debugReport()?}) → T? -
Invoke a callback provided by the application, catching and logging any
exceptions.
inherited
-
isPointerAllowed(
PointerDownEvent event) → bool -
Checks whether or not a pointer is allowed to be tracked by this recognizer.
override
-
isPointerPanZoomAllowed(
PointerPanZoomStartEvent event) → bool -
Checks whether or not a pointer pan/zoom is allowed to be tracked by this recognizer.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
rejectGesture(
int pointer) → void -
Called when this member loses the arena for the given pointer id.
override
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A brief description of this object, usually just the runtimeType and the
hashCode.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited